File Source for stream.php

<?php
/**
* @package Joomla.Platform
* @subpackage FileSystem
*
* @copyright Copyright (C) 2005 - 2013 Open Source Matters, Inc. All rights reserved.
* @license GNU General Public License version 2 or later; see LICENSE
*/
defined('JPATH_PLATFORM') or die;
/**
* Joomla! Stream Interface
*
* The Joomla! stream interface is designed to handle files as streams
* where as the legacy JFile static class treated files in a rather
* atomic manner.
*
* @package Joomla.Platform
* @subpackage FileSystem
*
* @note This class adheres to the stream wrapper operations:
* @see http://php.net/manual/en/function.stream-get-wrappers.php
* @see http://php.net/manual/en/intro.stream.php PHP Stream Manual
* @see http://php.net/manual/en/wrappers.php Stream Wrappers
* @see http://php.net/manual/en/filters.php Stream Filters
* @see http://php.net/manual/en/transports.php Socket Transports (used by some options, particularly HTTP proxy)
* @since 11.1
*/
class JStream extends JObject
{
/**
* File Mode
*
* @var integer
* @since 11.1
*/
protected $filemode = 0644;
/**
* Directory Mode
*
* @var integer
* @since 11.1
*/
protected $dirmode = 0755;
/**
* Default Chunk Size
*
* @var integer
* @since 11.1
*/
protected $chunksize = 8192;
/**
* Filename
*
* @var string
* @since 11.1
*/
protected $filename;
/**
* Prefix of the connection for writing
*
* @var string
* @since 11.1
*/
protected $writeprefix;
/**
* Prefix of the connection for reading
*
* @var string
* @since 11.1
*/
protected $readprefix;
/**
* Read Processing method
* @var string gz, bz, f
* If a scheme is detected, fopen will be defaulted
* To use compression with a network stream use a filter
* @since 11.1
*/
protected $processingmethod = 'f';
/**
* Filters applied to the current stream
*
* @var array
* @since 11.1
*/
protected $filters = array();
/**
* File Handle
*
* @var array
* @since 12.1
*/
protected $fh;
/**
* File size
*
* @var integer
* @since 12.1
*/
protected $filesize;
/**
* Context to use when opening the connection
*
* @var resource
* @since 12.1
*/
protected $context = null;
/**
* Context options; used to rebuild the context
*
* @var array
* @since 12.1
*/
protected $contextOptions;
/**
* The mode under which the file was opened
*
* @var string
* @since 12.1
*/
protected $openmode;
/**
* Constructor
*
* @param string $writeprefix Prefix of the stream (optional). Unlike the JPATH_*, this has a final path separator!
* @param string $readprefix The read prefix (optional).
* @param array $context The context options (optional).
*
* @since 11.1
*/
public function __construct($writeprefix = '', $readprefix = '', $context = array())
{
$this->writeprefix = $writeprefix;
$this->readprefix = $readprefix;
$this->contextOptions = $context;
$this->_buildContext();
}
/**
* Destructor
*
* @since 11.1
*/
public function __destruct()
{
// Attempt to close on destruction if there is a file handle
if ($this->fh)
{
@$this->close();
}
}
/**
* Generic File Operations
*
* Open a stream with some lazy loading smarts
*
* @param string $filename Filename
* @param string $mode Mode string to use
* @param boolean $use_include_path Use the PHP include path
* @param resource $context Context to use when opening
* @param boolean $use_prefix Use a prefix to open the file
* @param boolean $relative Filename is a relative path (if false, strips JPATH_ROOT to make it relative)
* @param boolean $detectprocessingmode Detect the processing method for the file and use the appropriate function
* to handle output automatically
*
* @return boolean
*
* @since 11.1
*/
public function open($filename, $mode = 'r', $use_include_path = false, $context = null,
$use_prefix = false, $relative = false, $detectprocessingmode = false)
{
$filename = $this->_getFilename($filename, $mode, $use_prefix, $relative);
if (!$filename)
{
$this->setError(JText::_('JLIB_FILESYSTEM_ERROR_STREAMS_FILENAME'));
return false;
}
$this->filename = $filename;
$this->openmode = $mode;
$url = parse_url($filename);
$retval = false;
if (isset($url['scheme']))
{
// If we're dealing with a Joomla! stream, load it
if (JFilesystemHelper::isJoomlaStream($url['scheme']))
{
require_once __DIR__ . '/streams/' . $url['scheme'] . '.php';
}
// We have a scheme! force the method to be f
$this->processingmethod = 'f';
}
elseif ($detectprocessingmode)
{
$ext = strtolower(JFile::getExt($this->filename));
switch ($ext)
{
case 'tgz':
case 'gz':
case 'gzip':
$this->processingmethod = 'gz';
break;
case 'tbz2':
case 'bz2':
case 'bzip2':
$this->processingmethod = 'bz';
break;
default:
$this->processingmethod = 'f';
break;
}
}
// Capture PHP errors
$php_errormsg = 'Error Unknown whilst opening a file';
$track_errors = ini_get('track_errors');
ini_set('track_errors', true);
// Decide which context to use:
switch ($this->processingmethod)
{
// Gzip doesn't support contexts or streams
case 'gz':
$this->fh = gzopen($filename, $mode, $use_include_path);
break;
// Bzip2 is much like gzip except it doesn't use the include path
case 'bz':
$this->fh = bzopen($filename, $mode);
break;
// Fopen can handle streams
case 'f':
default:
// One supplied at open; overrides everything
if ($context)
{
$this->fh = fopen($filename, $mode, $use_include_path, $context);
}
// One provided at initialisation
elseif ($this->context)
{
$this->fh = fopen($filename, $mode, $use_include_path, $this->context);
}
// No context; all defaults
else
{
$this->fh = fopen($filename, $mode, $use_include_path);
}
break;
}
if (!$this->fh)
{
$this->setError($php_errormsg);
}
else
{
$retval = true;
}
// Restore error tracking to what it was before
ini_set('track_errors', $track_errors);
// Return the result
return $retval;
}
/**
* Attempt to close a file handle
*
* Will return false if it failed and true on success
* If the file is not open the system will return true, this function destroys the file handle as well
*
* @return boolean
*
* @since 11.1
*/
public function close()
{
if (!$this->fh)
{
$this->setError(JText::_('JLIB_FILESYSTEM_ERROR_STREAMS_FILE_NOT_OPEN'));
return true;
}
$retval = false;
// Capture PHP errors
$php_errormsg = 'Error Unknown';
$track_errors = ini_get('track_errors');
ini_set('track_errors', true);
switch ($this->processingmethod)
{
case 'gz':
$res = gzclose($this->fh);
break;
case 'bz':
$res = bzclose($this->fh);
break;
case 'f':
default:
$res = fclose($this->fh);
break;
}
if (!$res)
{
$this->setError($php_errormsg);
}
else
{
// Reset this
$this->fh = null;
$retval = true;
}
// If we wrote, chmod the file after it's closed
if ($this->openmode[0] == 'w')
{
$this->chmod();
}
// Restore error tracking to what it was before
ini_set('track_errors', $track_errors);
// Return the result
return $retval;
}
/**
* Work out if we're at the end of the file for a stream
*
* @return boolean
*
* @since 11.1
*/
public function eof()
{
if (!$this->fh)
{
$this->setError(JText::_('JLIB_FILESYSTEM_ERROR_STREAMS_FILE_NOT_OPEN'));
return false;
}
// Capture PHP errors
$php_errormsg = '';
$track_errors = ini_get('track_errors');
ini_set('track_errors', true);
switch ($this->processingmethod)
{
case 'gz':
$res = gzeof($this->fh);
break;
case 'bz':
case 'f':
default:
$res = feof($this->fh);
break;
}
if ($php_errormsg)
{
$this->setError($php_errormsg);
}
// Restore error tracking to what it was before
ini_set('track_errors', $track_errors);
// Return the result
return $res;
}
/**
* Retrieve the file size of the path
*
* @return mixed
*
* @since 11.1
*/
public function filesize()
{
if (!$this->filename)
{
$this->setError(JText::_('JLIB_FILESYSTEM_ERROR_STREAMS_FILE_NOT_OPEN'));
return false;
}
$retval = false;
// Capture PHP errors
$php_errormsg = '';
$track_errors = ini_get('track_errors');
ini_set('track_errors', true);
$res = @filesize($this->filename);
if (!$res)
{
$tmp_error = '';
if ($php_errormsg)
{
// Something went wrong.
// Store the error in case we need it.
$tmp_error = $php_errormsg;
}
$res = JFilesystemHelper::remotefsize($this->filename);
if (!$res)
{
if ($tmp_error)
{
// Use the php_errormsg from before
$this->setError($tmp_error);
}
else
{
// Error but nothing from php? How strange! Create our own
$this->setError(JText::_('JLIB_FILESYSTEM_ERROR_STREAMS_FILE_SIZE'));
}
}
else
{
$this->filesize = $res;
$retval = $res;
}
}
else
{
$this->filesize = $res;
$retval = $res;
}
// Restore error tracking to what it was before.
ini_set('track_errors', $track_errors);
// Return the result
return $retval;
}
/**
* Get a line from the stream source.
*
* @param integer $length The number of bytes (optional) to read.
*
* @return mixed
*
* @since 11.1
*/
public function gets($length = 0)
{
if (!$this->fh)
{
$this->setError(JText::_('JLIB_FILESYSTEM_ERROR_STREAMS_FILE_NOT_OPEN'));
return false;
}
$retval = false;
// Capture PHP errors
$php_errormsg = 'Error Unknown';
$track_errors = ini_get('track_errors');
ini_set('track_errors', true);
switch ($this->processingmethod)
{
case 'gz':
$res = $length ? gzgets($this->fh, $length) : gzgets($this->fh);
break;
case 'bz':
case 'f':
default:
$res = $length ? fgets($this->fh, $length) : fgets($this->fh);
break;
}
if (!$res)
{
$this->setError($php_errormsg);
}
else
{
$retval = $res;
}
// Restore error tracking to what it was before
ini_set('track_errors', $track_errors);
// Return the result
return $retval;
}
/**
* Read a file
*
* Handles user space streams appropriately otherwise any read will return 8192
*
* @param integer $length Length of data to read
*
* @return mixed
*
* @see http://php.net/manual/en/function.fread.php
* @since 11.1
*/
public function read($length = 0)
{
if (!$this->filesize && !$length)
{
// Get the filesize
$this->filesize();
if (!$this->filesize)
{
// Set it to the biggest and then wait until eof
$length = -1;
}
else
{
$length = $this->filesize;
}
}
if (!$this->fh)
{
$this->setError(JText::_('JLIB_FILESYSTEM_ERROR_STREAMS_FILE_NOT_OPEN'));
return false;
}
$retval = false;
// Capture PHP errors
$php_errormsg = 'Error Unknown';
$track_errors = ini_get('track_errors');
ini_set('track_errors', true);
$remaining = $length;
do
{
// Do chunked reads where relevant
switch ($this->processingmethod)
{
case 'bz':
$res = ($remaining > 0) ? bzread($this->fh, $remaining) : bzread($this->fh, $this->chunksize);
break;
case 'gz':
$res = ($remaining > 0) ? gzread($this->fh, $remaining) : gzread($this->fh, $this->chunksize);
break;
case 'f':
default:
$res = ($remaining > 0) ? fread($this->fh, $remaining) : fread($this->fh, $this->chunksize);
break;
}
if (!$res)
{
$this->setError($php_errormsg);
// Jump from the loop
$remaining = 0;
}
else
{
if (!$retval)
{
$retval = '';
}
$retval .= $res;
if (!$this->eof())
{
$len = strlen($res);
$remaining -= $len;
}
else
{
// If it's the end of the file then we've nothing left to read; reset remaining and len
$remaining = 0;
$length = strlen($retval);
}
}
}
while ($remaining || !$length);
// Restore error tracking to what it was before
ini_set('track_errors', $track_errors);
// Return the result
return $retval;
}
/**
* Seek the file
*
* Note: the return value is different to that of fseek
*
* @param integer $offset Offset to use when seeking.
* @param integer $whence Seek mode to use.
*
* @return boolean True on success, false on failure
*
* @see http://php.net/manual/en/function.fseek.php
* @since 11.1
*/
public function seek($offset, $whence = SEEK_SET)
{
if (!$this->fh)
{
$this->setError(JText::_('JLIB_FILESYSTEM_ERROR_STREAMS_FILE_NOT_OPEN'));
return false;
}
$retval = false;
// Capture PHP errors
$php_errormsg = '';
$track_errors = ini_get('track_errors');
ini_set('track_errors', true);
switch ($this->processingmethod)
{
case 'gz':
$res = gzseek($this->fh, $offset, $whence);
break;
case 'bz':
case 'f':
default:
$res = fseek($this->fh, $offset, $whence);
break;
}
// Seek, interestingly, returns 0 on success or -1 on failure.
if ($res == -1)
{
$this->setError($php_errormsg);
}
else
{
$retval = true;
}
// Restore error tracking to what it was before
ini_set('track_errors', $track_errors);
// Return the result
return $retval;
}
/**
* Returns the current position of the file read/write pointer.
*
* @return mixed
*
* @since 11.1
*/
public function tell()
{
if (!$this->fh)
{
$this->setError(JText::_('JLIB_FILESYSTEM_ERROR_STREAMS_FILE_NOT_OPEN'));
return false;
}
// Capture PHP errors
$php_errormsg = '';
$track_errors = ini_get('track_errors');
ini_set('track_errors', true);
switch ($this->processingmethod)
{
case 'gz':
$res = gztell($this->fh);
break;
case 'bz':
case 'f':
default:
$res = ftell($this->fh);
break;
}
// May return 0 so check if it's really false
if ($res === false)
{
$this->setError($php_errormsg);
}
// Restore error tracking to what it was before
ini_set('track_errors', $track_errors);
// Return the result
return $res;
}
/**
* File write
*
* Whilst this function accepts a reference, the underlying fwrite
* will do a copy! This will roughly double the memory allocation for
* any write you do. Specifying chunked will get around this by only
* writing in specific chunk sizes. This defaults to 8192 which is a
* sane number to use most of the time (change the default with
* JStream::set('chunksize', newsize);)
* Note: This doesn't support gzip/bzip2 writing like reading does
*
* @param string &$string Reference to the string to write.
* @param integer $length Length of the string to write.
* @param integer $chunk Size of chunks to write in.
*
* @return boolean
*
* @see http://php.net/manual/en/function.fwrite.php
* @since 11.1
*/
public function write(&$string, $length = 0, $chunk = 0)
{
if (!$this->fh)
{
$this->setError(JText::_('JLIB_FILESYSTEM_ERROR_STREAMS_FILE_NOT_OPEN'));
return false;
}
// If the length isn't set, set it to the length of the string.
if (!$length)
{
$length = strlen($string);
}
// If the chunk isn't set, set it to the default.
if (!$chunk)
{
$chunk = $this->chunksize;
}
$retval = true;
// Capture PHP errors
$php_errormsg = '';
$track_errors = ini_get('track_errors');
ini_set('track_errors', true);
$remaining = $length;
$start = 0;
do
{
// If the amount remaining is greater than the chunk size, then use the chunk
$amount = ($remaining > $chunk) ? $chunk : $remaining;
$res = fwrite($this->fh, substr($string, $start), $amount);
// Returns false on error or the number of bytes written
if ($res === false)
{
// Returned error
$this->setError($php_errormsg);
$retval = false;
$remaining = 0;
}
elseif ($res === 0)
{
// Wrote nothing?
$remaining = 0;
$this->setError(JText::_('JLIB_FILESYSTEM_ERROR_NO_DATA_WRITTEN'));
}
else
{
// Wrote something
$start += $amount;
$remaining -= $res;
}
}
while ($remaining);
// Restore error tracking to what it was before.
ini_set('track_errors', $track_errors);
// Return the result
return $retval;
}
/**
* Chmod wrapper
*
* @param string $filename File name.
* @param mixed $mode Mode to use.
*
* @return boolean
*
* @since 11.1
*/
public function chmod($filename = '', $mode = 0)
{
if (!$filename)
{
if (!isset($this->filename) || !$this->filename)
{
$this->setError(JText::_('JLIB_FILESYSTEM_ERROR_STREAMS_FILENAME'));
return false;
}
$filename = $this->filename;
}
// If no mode is set use the default
if (!$mode)
{
$mode = $this->filemode;
}
$retval = false;
// Capture PHP errors
$php_errormsg = '';
$track_errors = ini_get('track_errors');
ini_set('track_errors', true);
$sch = parse_url($filename, PHP_URL_SCHEME);
// Scheme specific options; ftp's chmod support is fun.
switch ($sch)
{
case 'ftp':
case 'ftps':
$res = JFilesystemHelper::ftpChmod($filename, $mode);
break;
default:
$res = chmod($filename, $mode);
break;
}
// Seek, interestingly, returns 0 on success or -1 on failure
if (!$res)
{
$this->setError($php_errormsg);
}
else
{
$retval = true;
}
// Restore error tracking to what it was before.
ini_set('track_errors', $track_errors);
// Return the result
return $retval;
}
/**
* Get the stream metadata
*
* @return array header/metadata
*
* @see http://php.net/manual/en/function.stream-get-meta-data.php
* @since 11.1
*/
public function get_meta_data()
{
if (!$this->fh)
{
$this->setError(JText::_('JLIB_FILESYSTEM_ERROR_STREAMS_FILE_NOT_OPEN'));
return false;
}
return stream_get_meta_data($this->fh);
}
/**
* Stream contexts
* Builds the context from the array
*
* @return mixed
*
* @since 11.1
*/
public function _buildContext()
{
// According to the manual this always works!
if (count($this->contextOptions))
{
$this->context = @stream_context_create($this->contextOptions);
}
else
{
$this->context = null;
}
}
/**
* Updates the context to the array
*
* Format is the same as the options for stream_context_create
*
* @param array $context Options to create the context with
*
* @return void
*
* @see http://php.net/stream_context_create
* @since 11.1
*/
public function setContextOptions($context)
{
$this->contextOptions = $context;
$this->_buildContext();
}
/**
* Adds a particular options to the context
*
* @param string $wrapper The wrapper to use
* @param string $name The option to set
* @param string $value The value of the option
*
* @return void
*
* @see http://php.net/stream_context_create Stream Context Creation
* @see http://php.net/manual/en/context.php Context Options for various streams
* @since 11.1
*/
public function addContextEntry($wrapper, $name, $value)
{
$this->contextOptions[$wrapper][$name] = $value;
$this->_buildContext();
}
/**
* Deletes a particular setting from a context
*
* @param string $wrapper The wrapper to use
* @param string $name The option to unset
*
* @return void
*
* @see http://php.net/stream_context_create
* @since 11.1
*/
public function deleteContextEntry($wrapper, $name)
{
// Check whether the wrapper is set
if (isset($this->contextOptions[$wrapper]))
{
// Check that entry is set for that wrapper
if (isset($this->contextOptions[$wrapper][$name]))
{
// Unset the item
unset($this->contextOptions[$wrapper][$name]);
// Check that there are still items there
if (!count($this->contextOptions[$wrapper]))
{
// Clean up an empty wrapper context option
unset($this->contextOptions[$wrapper]);
}
}
}
// Rebuild the context and apply it to the stream
$this->_buildContext();
}
/**
* Applies the current context to the stream
*
* Use this to change the values of the context after you've opened a stream
*
* @return mixed
*
* @since 11.1
*/
public function applyContextToStream()
{
$retval = false;
if ($this->fh)
{
// Capture PHP errors
$php_errormsg = 'Unknown error setting context option';
$track_errors = ini_get('track_errors');
ini_set('track_errors', true);
$retval = @stream_context_set_option($this->fh, $this->contextOptions);
if (!$retval)
{
$this->setError($php_errormsg);
}
// Restore error tracking to what it was before
ini_set('track_errors', $track_errors);
}
return $retval;
}
/**
* Stream filters
* Append a filter to the chain
*
* @param string $filtername The key name of the filter.
* @param integer $read_write Optional. Defaults to STREAM_FILTER_READ.
* @param array $params An array of params for the stream_filter_append call.
*
* @return mixed
*
* @see http://php.net/manual/en/function.stream-filter-append.php
* @since 11.1
*/
public function appendFilter($filtername, $read_write = STREAM_FILTER_READ, $params = array())
{
$res = false;
if ($this->fh)
{
// Capture PHP errors
$php_errormsg = '';
$track_errors = ini_get('track_errors');
ini_set('track_errors', true);
$res = @stream_filter_append($this->fh, $filtername, $read_write, $params);
if (!$res && $php_errormsg)
{
$this->setError($php_errormsg);
}
else
{
$this->filters[] = &$res;
}
// Restore error tracking to what it was before.
ini_set('track_errors', $track_errors);
}
return $res;
}
/**
* Prepend a filter to the chain
*
* @param string $filtername The key name of the filter.
* @param integer $read_write Optional. Defaults to STREAM_FILTER_READ.
* @param array $params An array of params for the stream_filter_prepend call.
*
* @return mixed
*
* @see http://php.net/manual/en/function.stream-filter-prepend.php
* @since 11.1
*/
public function prependFilter($filtername, $read_write = STREAM_FILTER_READ, $params = array())
{
$res = false;
if ($this->fh)
{
// Capture PHP errors
$php_errormsg = '';
$track_errors = ini_get('track_errors');
ini_set('track_errors', true);
$res = @stream_filter_prepend($this->fh, $filtername, $read_write, $params);
if (!$res && $php_errormsg)
{
// Set the error msg
$this->setError($php_errormsg);
}
else
{
array_unshift($res, '');
$res[0] = &$this->filters;
}
// Restore error tracking to what it was before.
ini_set('track_errors', $track_errors);
}
return $res;
}
/**
* Remove a filter, either by resource (handed out from the append or prepend function)
* or via getting the filter list)
*
* @param resource &$resource The resource.
* @param boolean $byindex The index of the filter.
*
* @return boolean Result of operation
*
* @since 11.1
*/
public function removeFilter(&$resource, $byindex = false)
{
// Capture PHP errors
$php_errormsg = '';
$track_errors = ini_get('track_errors');
ini_set('track_errors', true);
if ($byindex)
{
$res = stream_filter_remove($this->filters[$resource]);
}
else
{
$res = stream_filter_remove($resource);
}
if ($res && $php_errormsg)
{
$this->setError($php_errormsg);
}
// Restore error tracking to what it was before.
ini_set('track_errors', $track_errors);
return $res;
}
/**
* Copy a file from src to dest
*
* @param string $src The file path to copy from.
* @param string $dest The file path to copy to.
* @param resource $context A valid context resource (optional) created with stream_context_create.
* @param boolean $use_prefix Controls the use of a prefix (optional).
* @param boolean $relative Determines if the filename given is relative. Relative paths do not have JPATH_ROOT stripped.
*
* @return mixed
*
* @since 11.1
*/
public function copy($src, $dest, $context = null, $use_prefix = true, $relative = false)
{
// Capture PHP errors
$php_errormsg = '';
$track_errors = ini_get('track_errors');
ini_set('track_errors', true);
$chmodDest = $this->_getFilename($dest, 'w', $use_prefix, $relative);
// Since we're going to open the file directly we need to get the filename.
// We need to use the same prefix so force everything to write.
$src = $this->_getFilename($src, 'w', $use_prefix, $relative);
$dest = $this->_getFilename($dest, 'w', $use_prefix, $relative);
if ($context)
{
// Use the provided context
$res = @copy($src, $dest, $context);
}
elseif ($this->context)
{
// Use the objects context
$res = @copy($src, $dest, $this->context);
}
else
{
// Don't use any context
$res = @copy($src, $dest);
}
if (!$res && $php_errormsg)
{
$this->setError($php_errormsg);
}
else
{
$this->chmod($chmodDest);
}
// Restore error tracking to what it was before
ini_set('track_errors', $track_errors);
return $res;
}
/**
* Moves a file
*
* @param string $src The file path to move from.
* @param string $dest The file path to move to.
* @param resource $context A valid context resource (optional) created with stream_context_create.
* @param boolean $use_prefix Controls the use of a prefix (optional).
* @param boolean $relative Determines if the filename given is relative. Relative paths do not have JPATH_ROOT stripped.
*
* @return mixed
*
* @since 11.1
*/
public function move($src, $dest, $context = null, $use_prefix = true, $relative = false)
{
// Capture PHP errors
$php_errormsg = '';
$track_errors = ini_get('track_errors');
ini_set('track_errors', true);
$src = $this->_getFilename($src, 'w', $use_prefix, $relative);
$dest = $this->_getFilename($dest, 'w', $use_prefix, $relative);
if ($context)
{
// Use the provided context
$res = @rename($src, $dest, $context);
}
elseif ($this->context)
{
// Use the object's context
$res = @rename($src, $dest, $this->context);
}
else
{
// Don't use any context
$res = @rename($src, $dest);
}
if (!$res && $php_errormsg)
{
$this->setError($php_errormsg());
}
$this->chmod($dest);
// Restore error tracking to what it was before
ini_set('track_errors', $track_errors);
return $res;
}
/**
* Delete a file
*
* @param string $filename The file path to delete.
* @param resource $context A valid context resource (optional) created with stream_context_create.
* @param boolean $use_prefix Controls the use of a prefix (optional).
* @param boolean $relative Determines if the filename given is relative. Relative paths do not have JPATH_ROOT stripped.
*
* @return mixed
*
* @since 11.1
*/
public function delete($filename, $context = null, $use_prefix = true, $relative = false)
{
// Capture PHP errors
$php_errormsg = '';
$track_errors = ini_get('track_errors');
ini_set('track_errors', true);
$filename = $this->_getFilename($filename, 'w', $use_prefix, $relative);
if ($context)
{
// Use the provided context
$res = @unlink($filename, $context);
}
elseif ($this->context)
{
// Use the object's context
$res = @unlink($filename, $this->context);
}
else
{
// Don't use any context
$res = @unlink($filename);
}
if (!$res && $php_errormsg)
{
$this->setError($php_errormsg());
}
// Restore error tracking to what it was before.
ini_set('track_errors', $track_errors);
return $res;
}
/**
* Upload a file
*
* @param string $src The file path to copy from (usually a temp folder).
* @param string $dest The file path to copy to.
* @param resource $context A valid context resource (optional) created with stream_context_create.
* @param boolean $use_prefix Controls the use of a prefix (optional).
* @param boolean $relative Determines if the filename given is relative. Relative paths do not have JPATH_ROOT stripped.
*
* @return mixed
*
* @since 11.1
*/
public function upload($src, $dest, $context = null, $use_prefix = true, $relative = false)
{
if (is_uploaded_file($src))
{
// Make sure it's an uploaded file
return $this->copy($src, $dest, $context, $use_prefix, $relative);
}
else
{
$this->setError(JText::_('JLIB_FILESYSTEM_ERROR_STREAMS_NOT_UPLOADED_FILE'));
return false;
}
}
/**
* Writes a chunk of data to a file.
*
* @param string $filename The file name.
* @param string &$buffer The data to write to the file.
*
* @return boolean
*
* @since 11.1
*/
public function writeFile($filename, &$buffer)
{
if ($this->open($filename, 'w'))
{
$result = $this->write($buffer);
$this->chmod();
$this->close();
return $result;
}
return false;
}
/**
* Determine the appropriate 'filename' of a file
*
* @param string $filename Original filename of the file
* @param string $mode Mode string to retrieve the filename
* @param boolean $use_prefix Controls the use of a prefix
* @param boolean $relative Determines if the filename given is relative. Relative paths do not have JPATH_ROOT stripped.
*
* @return string
*
* @since 11.1
*/
public function _getFilename($filename, $mode, $use_prefix, $relative)
{
if ($use_prefix)
{
// Get rid of binary or t, should be at the end of the string
$tmode = trim($mode, 'btf123456789');
// Check if it's a write mode then add the appropriate prefix
// Get rid of JPATH_ROOT (legacy compat) along the way
if (in_array($tmode, JFilesystemHelper::getWriteModes()))
{
if (!$relative && $this->writeprefix)
{
$filename = str_replace(JPATH_ROOT, '', $filename);
}
$filename = $this->writeprefix . $filename;
}
else
{
if (!$relative && $this->readprefix)
{
$filename = str_replace(JPATH_ROOT, '', $filename);
}
$filename = $this->readprefix . $filename;
}
}
return $filename;
}
/**
* Return the internal file handle
*
* @return File handler
*
* @since 11.1
*/
public function getFileHandle()
{
return $this->fh;
}
}

Documentation generated on Tue, 19 Nov 2013 15:14:28 +0100 by phpDocumentor 1.4.3

Source for file stream.php